Dioecious condition prevents

autogamy

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geitonogamy

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xenogamy

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(a) and (b) above

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Solution

The correct option is D (a) and (b) above
Dioecious species have the male and female reproductive structures on separate plants. It prevents autogamy and geitonogamy, both of which means self fertilisation. Xenogamy refers to cross fertilisation. Dioecy encourages cross fertilisation.

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